5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Rand Deeb <rand.sec96@xxxxxxxxx> [ Upstream commit e0b5127fa134fe0284d58877b6b3133939c8b3ce ] In ssb_calc_clock_rate(), there is a potential issue where the value of m1 could be zero due to initialization using clkfactor_f6_resolv(). This situation raised concerns about the possibility of a division by zero error. We fixed it by following the suggestions provided by Larry Finger <Larry.Finger@xxxxxxxxxxxx> and Michael Büsch <m@xxxxxxx>. The fix involves returning a value of 1 instead of 0 in clkfactor_f6_resolv(). This modification ensures the proper functioning of the code and eliminates the risk of division by zero errors. Signed-off-by: Rand Deeb <rand.sec96@xxxxxxxxx> Acked-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx> Acked-by: Michael Büsch <m@xxxxxxx> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx> Link: https://lore.kernel.org/r/20230904232346.34991-1-rand.sec96@xxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/ssb/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c index 8a93c83cb6f80..d52e91258e989 100644 --- a/drivers/ssb/main.c +++ b/drivers/ssb/main.c @@ -837,7 +837,7 @@ static u32 clkfactor_f6_resolve(u32 v) case SSB_CHIPCO_CLK_F6_7: return 7; } - return 0; + return 1; } /* Calculate the speed the backplane would run at a given set of clockcontrol values */ -- 2.43.0
